An adaptive wire clamp device for loop resistance testing

Abstract

The invention discloses an adaptive wire clamp device for loop resistance testing, including an aperture contact assembly and a wiring clamp assembly arranged on the aperture contact assembly, and the invention relates to the technical field of instrumentation. The adaptive wire clamp device for loop resistance testing can drive a plurality of blades to move together by rotating an insulating rod and a rotating disk, forming nearly circular openings of different calibers to adapt to circuit breaker contacts of different calibers, and under the setting of a spring, effectively ensures close contact with circuit breaker contacts of different calibers, increases the contact area, reduces the contact resistance, avoids contact surface ablation caused by increased contact resistance, and improves equipment safety. At the same time, the adaptive test wire clamp is easy to clamp, the contact resistance is reduced, and the data accuracy is improved, thereby greatly improving work efficiency and solving the problems of easy damage to equipment, large deviation in test data, and low work efficiency in the original clamp-type wire clamp.

Description

Technical Field

[0001] The invention relates to the technical field of instruments and meters, and in particular to an adaptive wire clamp device for loop resistance testing. Background Art

[0002] Circuit breaker loop resistance test is a test project frequently and widely carried out in substations. It can effectively diagnose the equipment status and ensure the safe and reliable operation of the power grid. During the test, traditional test wire clamps have many disadvantages such as inconvenient clamping, large deviation of test data, and easy wear of equipment, which leads to cumbersome wiring and disconnection processes. Therefore, an adaptive wire clamp device for loop resistance testing is proposed, which can effectively adapt to the electrical test requirements of different types of electrical equipment, greatly improve on-site operation efficiency, improve work quality, and ensure the simplification, standardization and normalization of the operation process. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides an adaptive wire clamp device for loop resistance testing, which solves the problem of complicated wiring connection and disconnection processes, such as the inconvenient clamping, large test data deviation, and easy wear of the traditional test wire clamp.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adaptive wire clamp device for loop resistance testing, comprising an aperture contact assembly and a wiring clamping assembly arranged on the aperture contact assembly, the aperture contact assembly comprising a base, a plurality of fan blades and a turntable, the turntable is rotatably mounted inside the base through an elastic retaining spring, a plurality of fixing holes are opened at the bottom of the inner cavity of the base, a plurality of long strip grooves are fixedly mounted at the bottom of the turntable, the fan blades are arranged in the inner cavity of the base and are located below the turntable, and one side of the top of the fan blade and the bottom One side is fixedly connected with a positioning pin that is compatible with the fixing hole and the long strip groove. The outer periphery of the turntable is threadedly connected with an insulating rod by opening a threaded hole, and the outer periphery of the base is provided with a gap that is compatible with the insulating rod. The outer periphery of the base is welded and fixed with a copper joint. The wiring clamping assembly is fixedly installed on the copper joint for fixing the wiring head. The surface of the insulating rod is fixedly connected with an arc tube through a mounting nut, and the surface of the copper joint is provided with an opening that is compatible with the arc tube. A spring is sleeved on the outer surface of the arc tube and is located between the insulating rod and the copper joint.

[0007] By adopting the above technical solution, the fan blades are arranged below the turntable, and through the coordinated arrangement of the fixing hole, the long strip groove and the positioning pin, the positioning pin can be driven to perform telescopic movement in the long strip groove as long as the insulating rod is rotated to rotate the turntable. When a number of fan blades move together, they form nearly circular openings of different calibers to adapt to circuit breaker contacts of different calibers. Moreover, under the setting of the spring, close contact with circuit breaker contacts of different calibers is effectively guaranteed, the contact area is increased, the contact resistance is reduced, the contact surface ablation caused by the increase of contact resistance is avoided, and the safety of the equipment is improved. At the same time, the adaptive test wire clamp is convenient for clamping, the contact resistance is reduced, and the data accuracy is improved, thereby greatly improving the work efficiency and solving the problems of easy damage to the equipment, large deviation of the test data and low work efficiency existing in the original clamp-type wire clamp.

[0008] The present invention is further configured as follows: two ends of the spring are fixedly connected to the left side of the insulating rod and the top of the copper joint respectively, and the spring is arranged above the gap.

[0009] The present invention is further configured as follows: the wiring clamping assembly includes an insulating screw rod, the outer surface of which is threadedly connected with an insulating nut and two fastening nuts in sequence from top to bottom, and the outside of the insulating screw rod is sequentially sleeved with three gaskets from top to bottom.

[0010] The present invention is further configured as follows: a threaded hole compatible with the insulating nut is opened on the side of the top of the copper joint away from the opening, a gasket is arranged below the copper joint and the fastening nut arranged at the bottom, and the remaining two gaskets are arranged between the fastening nut arranged at the top and the insulating nut, for fixing the terminal head.

[0011] By adopting the above technical solution, the insulating screw, the fastening nut and a gasket are used to directly fix it on the copper joint. With the setting of the insulating nut and the two gaskets, convenient and stable clamping of the terminal head can be achieved. While being easy to use, the wiring clamping assembly can be easily disassembled as a whole. When the components are damaged, they can be conveniently repaired and replaced.

[0012] The present invention is further configured as follows: a clamping groove adapted to the elastic clamping spring is provided on the top of the inner wall of the base.

[0013] The present invention is further configured as follows: the base and the fan blades are both made of copper material, and the turntable is made of epoxy board material.

[0014] The present invention is further configured as follows: the insulating rod includes a connecting rod and an insulating sheath, the insulating sheath is sleeved on the outer surface of one end of the connecting rod, and the other end of the connecting rod is threadedly connected to the inner surface of a threaded hole opened on the outer surface of the turntable, and the surface of the connecting rod is provided with a screw hole adapted to the arc tube.

[0015] The present invention is further configured as follows: the conductive part of the wiring clamping assembly is made of red copper material to ensure good contact with the copper joint.

[0016] (III) Beneficial effects

[0017] The present invention provides an adaptive wire clamp device for loop resistance testing, which has the following beneficial effects:

[0018] (1) The adaptive wire clamp device for loop resistance testing has a fan blade arranged below a turntable, and a fixed hole, a long strip groove and a positioning pin. As long as the insulating rod is rotated to rotate the turntable, the positioning pin can be driven to perform telescopic movement in the long strip groove. When a plurality of fan blades move together, they form nearly circular openings of different diameters to adapt to circuit breaker contacts of different diameters. In addition, under the setting of the spring, close contact with circuit breaker contacts of different diameters is effectively ensured, the contact area is increased, the contact resistance is reduced, contact surface erosion caused by increased contact resistance is avoided, and equipment safety is improved. In addition, the contact surface is smooth and will not damage the circuit breaker contact surface, thereby improving equipment safety. At the same time, the adaptive test wire clamp is easy to clamp, the contact resistance is reduced, and the data accuracy is improved, thereby greatly improving work efficiency and solving the problems of easy damage to equipment, large test data deviation and low work efficiency existing in the original clamp-type wire clamp.

[0019] (2) The adaptive wire clamp device for loop resistance testing is directly fixed on the copper joint by using the cooperation of an insulating screw, a fastening nut and a gasket. With the setting of the insulating nut and two gaskets, the wire head can be conveniently and stably clamped. While being easy to use, the wiring clamping assembly can be conveniently disassembled as a whole. When a component is damaged, it can be conveniently repaired and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the base, the rotating disk, the elastic retaining spring, the fixing hole and the long strip groove of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the wiring clamping assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the connection between the base and the copper joint structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the connecting rod, the rotating disk and the long strip groove of the present invention;

[0025] Figure 6It is a schematic diagram of the connection of the base, copper joint, gap, opening and threaded hole structure of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the fan blade of the present invention;

[0027] Figure 8 It is a schematic diagram of the connection between the fan blade and the positioning pin structure of the present invention.

[0028] In the figure, 1. aperture contact assembly; 2. wiring clamping assembly; 3. base; 4. fan blades; 5. turntable; 6. elastic retaining spring; 7. fixing hole; 8. long strip groove; 9. insulating rod; 10. gap; 11. copper joint; 12. mounting nut; 13. arc tube; 14. opening; 15. spring; 16. insulating screw rod; 17. insulating nut; 18. fastening nut; 19. gasket; 20. threaded hole; 21. slot; 22. connecting rod; 23. insulating sheath; 24. screw hole; 25. positioning pin. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-8 The embodiment of the present invention provides a technical solution: an adaptive wire clamp device for loop resistance testing, comprising an aperture contact assembly 1 and a wiring clamp assembly 2 arranged on the aperture contact assembly 1, specifically, as shown in the attached Figure 3 As shown, the wiring clamping assembly 2 includes an insulating screw rod 16, the outer surface of which is threadedly connected with an insulating nut 17 and two fastening nuts 18 from top to bottom, and the outside of the insulating screw rod 16 is sequentially sleeved with three gaskets 19 from top to bottom, wherein the insulating screw rod 16 and the insulating nut 17 are provided with longitudinal textures to increase friction and facilitate manual tightening.

[0031] Specifically, a threaded hole 20 that matches the insulating nut 17 is opened on the side of the top of the copper joint 11 away from the opening 14, a gasket 19 is arranged below the copper joint 11 and the fastening nut 18 arranged at the bottom, and the remaining two gaskets 19 are arranged between the fastening nut 18 arranged at the top and the insulating nut 17, for fixing the terminal head.

[0032] As a preferred solution, in order to ensure good contact between the wiring clamping assembly 2 and the copper joint 11 , the conductive part of the wiring clamping assembly 2 is made of copper material to ensure good contact with the copper joint 11 .

[0033] As a preferred solution, the aperture contact assembly 1 includes a base 3, a plurality of blades 4 and a turntable 5. Specifically, the base 3 and the blades 4 are made of copper material, the turntable 5 is made of epoxy board material, and the turntable 5 is rotatably mounted inside the base 3 through an elastic retaining spring 6. Figure 2 As shown, a clamping groove 21 adapted to the elastic clamping spring 6 is provided on the top of the inner wall of the base 3 .

[0034] As a preferred solution, a plurality of fixing holes 7 are provided at the bottom of the inner cavity of the base 3, a plurality of long strip grooves 8 are fixedly installed at the bottom of the turntable 5, the fan blades are arranged in the inner cavity of the base 3 and are located below the turntable 5, one side of the top and one side of the bottom of the fan blade 4 are respectively fixedly connected with positioning pins 25 adapted to the fixing holes 7 and the long strip grooves 8, and the outer periphery of the turntable 5 is threadedly connected with an insulating rod 9 through a threaded hole, as shown in the attached Figure 1 As shown, the insulating rod 9 includes a connecting rod 22 and an insulating sheath 23. Specifically, the insulating sheath 23 is used to achieve 5kV voltage isolation. The insulating sheath 23 is sleeved on the outer surface of one end of the connecting rod 22, and the other end of the connecting rod 22 is threadedly connected to the inner surface of the threaded hole opened on the outer surface of the turntable 5. The surface of the connecting rod 22 is provided with a screw hole 24 that is compatible with the arc tube 13, and the diameter of the screw hole 24 is set to 6mm.

[0035] As a preferred solution, a gap 10 that is compatible with the insulating rod 9 is opened on the outer periphery of the base 3, a copper joint 11 is welded and fixed on the outer periphery of the base 3, and the wiring clamping assembly 2 is fixedly installed on the copper joint 11 for fixing the wiring head. The surface of the insulating rod 9 is fixedly connected to an arc tube 13 through an installation nut 12. The arc tube 13 is made of stainless steel material, and an opening 14 that is compatible with the arc tube 13 is opened on the surface of the copper joint 11. A spring 15 is sleeved on the outer surface of the arc tube 13 and is located between the insulating rod 9 and the copper joint 11.

[0036] As a detailed description, two ends of the spring 15 are fixedly connected to the left side of the insulating rod 9 and the top of the copper joint 11 respectively, and the spring 15 is arranged above the gap 10.

[0037] During operation, the rotating insulating rod 9 drives the turntable 5 to rotate along the gap 10, so that one positioning pin 25 rotates around the fixing hole 7, and the other positioning pin 25 performs telescopic movement in the long strip groove 8, so that a plurality of fan blades 4 move together to form nearly circular openings of different calibers to adapt to the circuit breaker contacts of corresponding calibers. During the process, the insulating rod 9 drives the arc tube 13 to pass through the opening 14 to compress the spring 15. After the opening contacts the circuit breaker contacts, the insulating rod 9 is released, and under the elastic force of the spring 15, it comes into close contact with the circuit breaker contacts.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptive wire clamp device for loop resistance testing, comprising an aperture contact assembly (1) and a wire clamp assembly (2) arranged on the aperture contact assembly (1), characterized in that: The aperture contact assembly (1) comprises a base (3), a plurality of blades (4) and a turntable (5); the turntable (5) is rotatably mounted inside the base (3) via an elastic retaining spring (6); a plurality of fixing holes (7) are provided at the bottom of the inner cavity of the base (3); a plurality of long strip grooves (8) are fixedly mounted at the bottom of the turntable (5); the blades are arranged in the inner cavity of the base (3) and are located below the turntable (5); one side of the top and one side of the bottom of the blades (4) are respectively fixedly connected with positioning pins (25) that are compatible with the fixing holes (7) and the long strip grooves (8); the outer periphery of the turntable (5) is threadedly connected with an insulating rod (9) via a threaded hole; and the base (3) is provided with a plurality of fixing holes (7) at the bottom. A slit (10) is provided on the outer periphery and is matched with the insulating rod (9); a copper joint (11) is welded and fixed on the outer periphery of the base (3); the wiring clamping assembly (2) is fixedly mounted on the copper joint (11) and is used to fix the wiring head; the surface of the insulating rod (9) is fixedly connected with an arc tube (13) through a mounting nut (12); the surface of the copper joint (11) is provided with an opening (14) matched with the arc tube (13); a spring (15) is sleeved on the outer surface of the arc tube (13) and is located between the insulating rod (9) and the copper joint (11); the base (3) and the fan blades (4) are both made of copper material, and the turntable (5) is made of epoxy board material.

2. The adaptive wire clamp device for loop resistance testing according to claim 1, characterized in that: The two ends of the spring (15) are respectively fixedly connected to the left side of the insulating rod (9) and the top of the copper joint (11), and the spring (15) is arranged above the gap (10).

3. The adaptive wire clamp device for loop resistance testing according to claim 1, characterized in that: The wiring clamping assembly (2) comprises an insulating screw rod (16), the outer surface of which is threadedly connected with an insulating nut (17) and two fastening nuts (18) in sequence from top to bottom, and the outside of the insulating screw rod (16) is sleeved with three gaskets (19) in sequence from top to bottom.

4. The adaptive wire clamp device for loop resistance testing according to claim 3, characterized in that: A threaded hole (20) adapted to the insulating nut (17) is provided on one side of the top of the copper joint (11) away from the opening (14); a washer (19) is arranged below the copper joint (11) and the fastening nut (18) arranged at the bottom; and the remaining two washers (19) are arranged between the fastening nut (18) arranged at the top and the insulating nut (17) for fixing the terminal.

5. The adaptive wire clamp device for loop resistance testing according to claim 1, characterized in that: A clamping groove (21) adapted to the elastic clamping spring (6) is provided at the top of the inner wall of the base (3).

6. The adaptive wire clamp device for loop resistance testing according to claim 1, characterized in that: The insulating rod (9) comprises a connecting rod (22) and an insulating sheath (23), wherein the insulating sheath (23) is sleeved on the outer surface of one end of the connecting rod (22), and the other end of the connecting rod (22) is threadedly connected to the inner surface of a threaded hole provided on the outer surface of the turntable (5), and a screw hole (24) adapted to the arc tube (13) is provided on the surface of the connecting rod (22).

7. The adaptive wire clamp device for loop resistance testing according to claim 1, characterized in that: The conductive part of the wiring clamping assembly (2) is made of copper material to ensure good contact with the copper connector (11).

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